CN105041663A - Vibration attenuation condensate pump and vibration attenuation method thereof - Google Patents
Vibration attenuation condensate pump and vibration attenuation method thereof Download PDFInfo
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- CN105041663A CN105041663A CN201510356226.XA CN201510356226A CN105041663A CN 105041663 A CN105041663 A CN 105041663A CN 201510356226 A CN201510356226 A CN 201510356226A CN 105041663 A CN105041663 A CN 105041663A
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Abstract
The invention relates to a vibration attenuation condensate pump and a vibration attenuation method thereof. One of four stages of impellers in an original condensate pump structure is eliminated, the section with the high resonant frequency of the condensate pump is avoided, and outlet blade edges of all remaining impellers are moderately polished until all impellers accord with the vibration attenuation size, so that the flow capacity of openings of the impellers is improved, and the original unbalance of the impellers is overcome. The method which combines changes of smoothness of fluid at outlets of the impellers of the condensate pump and eliminating of the original slight unbalance of the impellers is provided, so that the problem of low-frequency vibration of the condensate pump is effectively solved, and the reliability of the condensate pump equipment is improved; and meanwhile, the running current of the condensate pump is reduced, the utilized power is saved, and it is guaranteed that a power plant safely and economically runs with high quality.
Description
Technical field
The present invention relates to a kind of vibration damping condensate pump and oscillation damping method thereof.
Background technique
The 4*660MW unit condensate pump of the international Lv Si port Power Generation Corporation Ltd. of Jiangsu Datang is vertical multi-stage centrifugal pump, adopt Changsha water pump works C720 III-4 type product, as shown in Figure 1, this condensate pump 1 comprises level Four impeller, is one stage impeller 1-1, sencond stage impeller 1-2, three grades of impeller 1-3 and level Four impeller 1-4 respectively.The original design of condensate pump is that condensate pump power frequency 50HZ runs, and water of condensation is for hydromining pitch flow restriction control on oxygen-eliminating device, and system throttles loss is large, condensate pump running current high (about 230A).For reducing station service power consumption rate, reduce condensate system restriction loss, within 2012, condensate pump has changed frequency conversion.Condensate pump has saved station service after changing converting operation greatly, but after Frequency Conversion Modification, condensate pump motor oscillating increases, affect equipment security of operation, particularly condensate pump motor free end vibration, show particularly evident, when frequency drops to about 40HZ, the vibration of condensate pump motor free end is more than 80um, exceed the designing requirement of condensate pump motor oscillating, thus can only at 40-50HZ scope converting operation, Condensate Pump Frequency Conversion range of operation is limited, Frequency Conversion Modification condensate pump ubiquity low-frequency operation vibrates large problem, and vibration exceeds equipment safety operation scope, Condensate Pump Frequency Conversion energy-saving effect is caused to be had a greatly reduced quality.
Summary of the invention
The invention provides a kind of vibration damping condensate pump and oscillation damping method thereof, by the method changing condensate pump impeller outlet fluid flow fields, the original slight amount of unbalance of elimination impeller combines, effectively solve condensate pump low frequency Vibration, improve the reliability of condensate pump equipment, reduce condensate pump running current simultaneously, save electricity consumption, ensure that power plant safety, high-quality, economic operation.
In order to achieve the above object, the invention provides a kind of vibration damping condensate pump, comprise three grades of impellers;
The thickness range of the outlet limb of described every one stage impeller is 3-4mm;
The weight range of described every one stage impeller is 50-60kg.
The present invention also provides a kind of oscillation damping method of condensate pump, comprises following steps:
Level Four impeller in original condensate pump structure is removed one-level, and remaining three grades of impellers, avoid the interval that condensate pump resonant frequency is 35-40Hz;
The outlet limb of the every one stage impeller in three grades of remaining impellers is polished, until every one stage impeller meets vibration damping size, promotes the through-current capability of impeller opening, improve the amount of unbalance that impeller is original.
Described vibration damping size comprises: the thickness range of the outlet limb of impeller is 3-4mm, and the weight range of impeller is 50-60kg.
The present invention has the following advantages:
1, make the converting operation degree of depth of condensate pump reach 35HZ, when comparing low-limit frequency 40HZ, condensate pump running current is minimum have dropped 20A-30A, and energy-saving effect is obvious, improves economic benefit.
2, transformation is simple, and little investment, not be used on equipment and do large change, the duration is short, does not increase equipment appurtenance, and unit light maintenance can be implemented, and Plant reconstruction plant modernization negative effect is little, does not reduce equipment and exerts oneself and systemic-function.
3, Condensate Pump Frequency Conversion regulation range broadens (50HZ-35HZ), entire system efficiengy-increasing.
Accompanying drawing explanation
Fig. 1 is the simple structure schematic diagram of condensate pump in background technique.
Fig. 2 is the simple structure schematic diagram of vibration damping condensate pump provided by the invention.
Embodiment
Following according to Fig. 2, illustrate preferred embodiment of the present invention.
As shown in Figure 2, the invention provides a kind of vibration damping condensate pump 1, comprise three grades of impellers, is one stage impeller 101, sencond stage impeller 102 and three grades of impellers 103 respectively.
The thickness range of the outlet limb of described every one stage impeller is 3-4mm.
The weight range of described every one stage impeller is 50-60kg.
The present invention also provides a kind of oscillation damping method of condensate pump, comprises following steps:
Step S1, the third level impeller in original condensate pump structure to be removed, remaining three grades of impellers.
Step S2, appropriateness polishing is carried out to the outlet limb of the every one stage impeller in three grades of remaining impellers, until often one stage impeller meets vibration damping size.
Described vibration damping size comprises: the thickness of the outlet limb of impeller is 3-4mm, and the weight of impeller is 50-60kg.
It is at below 40Hz that Condensate Pump Frequency Conversion vibrates large range between a frequency majority, under the prerequisite of identical condensing water flow, the water pump of exerting oneself little needs higher rotating speed just can meet the requirements of flow, by taking down one stage impeller from the level Four impeller of condensate pump, reduce exerting oneself of condensate pump, the rotating speed of condensate pump under identical condensing water flow is made to increase, condensate pump operates in higher frequency, thus avoid vibrating high 35-40Hz range between a frequency, control the object of condensate pump motor oscillating under reaching the prerequisite meeting operation demand.Cancelling one stage impeller to reach on the basis of resonance avoidance, the flow passage openings of three grades of remaining impellers is repaired, impeller outlet limb thickness is reduced 0.5-1mm by the method for being polished by impeller, thus promote the through-current capability of impeller opening, after polishing impeller limb thickness, be equivalent to carry out loss of weight to impeller, improve the amount of unbalance that impeller is original, the critical speed of rotation interval of impeller must be made to change, change the original resonant frequency of impeller interval, reach and neither reduce the double goal that condensate pump maximum output administers again Condensate Pump Frequency Conversion vibration, thus solve the large problem of particular low frequency Oscillation.
The corresponding transformation that utilized the oscillation damping method of condensate pump provided by the invention to carry out of 8 condensate pumps in the international Lv Si port power plant of Jiangsu Datang 4 units, 7 condensate pump low-frequency resonance frequencies are had to drop to below 35HZ by 40HZ, a remaining frequency drops to 38HZ, solves the large problem of condensate pump low-frequency vibration in common loading zone.
The present invention is by the method changing condensate pump impeller outlet fluid flow fields, the original slight amount of unbalance of elimination impeller combines, effectively solve condensate pump low frequency Vibration, improve the reliability of condensate pump equipment, reduce condensate pump running current simultaneously, save electricity consumption, ensure that power plant safety, high-quality, economic operation.
Although content of the present invention has done detailed introduction by above preferred embodiment, will be appreciated that above-mentioned description should not be considered to limitation of the present invention.After those skilled in the art have read foregoing, for multiple amendment of the present invention and substitute will be all apparent.Therefore, protection scope of the present invention should be limited to the appended claims.
Claims (3)
1. a vibration damping condensate pump, is characterized in that, comprises three grades of impellers;
The thickness range of the outlet limb of described every one stage impeller is 3-4mm;
The weight range of described every one stage impeller is 50-60kg.
2. an oscillation damping method for condensate pump, is characterized in that, comprises following steps:
Level Four impeller in original condensate pump structure is removed the third level, and remaining three grades of impellers, avoid the interval that condensate pump resonant frequency is 35-40Hz;
The outlet limb of the every one stage impeller in three grades of remaining impellers is polished, until every one stage impeller meets vibration damping size, promotes the through-current capability of impeller opening, improve the amount of unbalance that impeller is original.
3. the oscillation damping method of condensate pump as claimed in claim 2, it is characterized in that, described vibration damping size comprises: the thickness range of the outlet limb of impeller is 3-4mm, and the weight range of impeller is 50-60kg.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510356226.XA CN105041663A (en) | 2015-06-25 | 2015-06-25 | Vibration attenuation condensate pump and vibration attenuation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510356226.XA CN105041663A (en) | 2015-06-25 | 2015-06-25 | Vibration attenuation condensate pump and vibration attenuation method thereof |
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| CN105041663A true CN105041663A (en) | 2015-11-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510356226.XA Pending CN105041663A (en) | 2015-06-25 | 2015-06-25 | Vibration attenuation condensate pump and vibration attenuation method thereof |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106837882A (en) * | 2017-01-24 | 2017-06-13 | 中国机械工业集团有限公司 | Vibration absorber upgrading construction method under a kind of disassembly status of pump equipment zero |
| RU2651912C1 (en) * | 2017-08-15 | 2018-04-24 | Алексей Юрьевич Криштафович | Centrifugal pump |
| RU2651911C1 (en) * | 2017-08-15 | 2018-04-24 | Алексей Юрьевич Криштафович | Centrifugal pump |
| WO2019092394A1 (en) * | 2017-11-10 | 2019-05-16 | Aspen Pumps Limited | Pumps |
Citations (3)
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| US6389834B1 (en) * | 2001-02-19 | 2002-05-21 | Whirlpool Corporation | Condensate pumping system for air conditioners |
| JP2003206705A (en) * | 2002-01-17 | 2003-07-25 | Mitsubishi Heavy Ind Ltd | Condensate pump structure and steam turbine installation |
| CN202628930U (en) * | 2012-06-09 | 2012-12-26 | 刘石 | Frequency conversion condensate pump dynamic vibration absorber |
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2015
- 2015-06-25 CN CN201510356226.XA patent/CN105041663A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6389834B1 (en) * | 2001-02-19 | 2002-05-21 | Whirlpool Corporation | Condensate pumping system for air conditioners |
| JP2003206705A (en) * | 2002-01-17 | 2003-07-25 | Mitsubishi Heavy Ind Ltd | Condensate pump structure and steam turbine installation |
| CN202628930U (en) * | 2012-06-09 | 2012-12-26 | 刘石 | Frequency conversion condensate pump dynamic vibration absorber |
Non-Patent Citations (1)
| Title |
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| 张旭东 等: "宁德电厂凝结水泵节能优化改造", 《黑龙江电力》 * |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106837882A (en) * | 2017-01-24 | 2017-06-13 | 中国机械工业集团有限公司 | Vibration absorber upgrading construction method under a kind of disassembly status of pump equipment zero |
| CN106837882B (en) * | 2017-01-24 | 2019-01-29 | 中国机械工业集团有限公司 | A kind of pump equipment vibration absorber upgrading construction method |
| RU2651912C1 (en) * | 2017-08-15 | 2018-04-24 | Алексей Юрьевич Криштафович | Centrifugal pump |
| RU2651911C1 (en) * | 2017-08-15 | 2018-04-24 | Алексей Юрьевич Криштафович | Centrifugal pump |
| WO2019092394A1 (en) * | 2017-11-10 | 2019-05-16 | Aspen Pumps Limited | Pumps |
| CN111465768A (en) * | 2017-11-10 | 2020-07-28 | 阿斯彭水泵有限公司 | Pump and method of operating the same |
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| PB01 | Publication | ||
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Application publication date: 20151111 |